Tektronix Phaser 840, Краткое руководство пользователя

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Phaser 840 Color Printer
Cap/wipe/purge assembly belt adjustments
The tension of the cap/wipe/purge assembly belts is factory-set. Do not adjust
them unless you remove or replace one or both belts. The belts are Kevlar-
reinforced; they will not stretch over their lifetime. The belts are also factory-
adjusted for parallel tracking (alignment). As long as the belts, cap/wipe/purge
assembly motor, or the belt clips (which hold the cap/wipe/purge assembly) are
not disturbed, no adjustment is needed.
However, if you replace one or both of the belts or the cap/wipe/purge drive
motor, you must ensure that the belts are in alignment (timing) with each other;
this ensures that the cap/wipe/purge assembly is perfectly aligned to the
faceplate of the printhead. If the belts are not aligned, the printhead purging is
ineffective, due to poor sealing between the printhead faceplate and the cap/
wipe/purge assembly.
1. Ensure that the cap/wipe/purge assembly is properly installed.
2. Rotate the large drive gear to pull the cap/wipe/purge assembly to
about the middle of its travel in the chassis frame slot.
3. Ensure each timing belt lock is tightened to its fourth tooth, as
illustrated.
4.
Position the left-side timing belt lock so its pointer points between the
index mark on the printer frame.
5.
Holding the left belt so it does not move, inspect the right-side timing
belt lock’s pointer. It should point at the index mark on the right-side
printer frame.
If the right-side pointer does not point to the index mark while the left-
side belt lock is between its marks, loosen the right timing belt by
removing the lower idler pulley and adjusting the belt so that it aligns
with the timing mark.
6.
Repeat until the right-side timing lock’s pointer points at the index
mark on the right-side frame as the left-side timing belt lock’s pointer
points between its index marks on the left-side frame.